feat: kanban status buttons, task back-nav, RSS UI, weather search, briefing fixes

Project view:
- Add inline status advance buttons on kanban task cards (todo→in_progress,
  in_progress→done); buttons reveal on hover, stop link navigation

Task viewer:
- Back button navigates to task's project instead of /tasks when project_id set
- Esc key navigates to project (or /tasks); blurs focused element first

Quick capture:
- Use user's configured model instead of hardcoded Config.OLLAMA_MODEL
- Remove create_project from classifier prompt (tool not offered, caused
  task-shaped inputs to silently fall through to note fallback)

Briefing scheduler:
- Fix get_event_loop() → get_running_loop() so background thread uses the
  correct hypercorn event loop (jobs were scheduling but never executing)
- Suppress bare greeting when both LLM synthesis lanes return empty

RSS feed UI (SettingsView):
- Show last-fetched age, category badge, and feed URL per row
- Category input field when adding a feed
- Refresh all button: fetches latest items, reloads list, toasts with count
- Enter key submits add-feed form; better empty-state hint with example feeds

Weather tool:
- Accept any city/region name in addition to 'home'/'work'/'all'
- Geocodes via Nominatim + fetches live from Open-Meteo for arbitrary queries

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/fabledassistant/app.py

@@ -246,7 +246,7 @@ def create_app() -> Quart:
 
         # Start briefing scheduler
         from fabledassistant.services.briefing_scheduler import start_briefing_scheduler
-        start_briefing_scheduler(asyncio.get_event_loop())
+        start_briefing_scheduler(asyncio.get_running_loop())
 
     @app.after_serving
     async def shutdown():